1
energy generated for heat and electricity using the power of falling water or water moving through a dam
2
natural resources that are used up at a rate faster than they can be replaced
3
energy resources useful to man that are considered alternative to fossil fuels
4
energy from heat found deep inside the Earth's surface
5
energy generated through the processing of renewable plant and animal materials
6
energy from the Sun in the form of heat and light
7
energy generated from the movement of air
